Speed not a concern... strangest thing to ask for on such a lens. I would live with f8! After all these are used for deep focus photography and on tripods or in studio. T/S is about increasing depth of field.

Me neither, I am slowly switching to Nikon because of the superior image quality. (I am shooting low-iso only)But, with almost twenty canon lenses that is a big step for mankind, and some of the Canon lenses are better than the Nikon alternetives....

It'd be a shame if canon surprises us with a sensor better than sony/nikons. If you do plan on switching, let us know whats for sale.

Speed not a concern... strangest thing to ask for on such a lens. I would live with f8! After all these are used for deep focus photography and on tripods or in studio. T/S is about increasing depth of field.

Tilt is about changing the focal plane. Sometimes this is used to increase the depth of field on the subject. Sometimes it's not.... and that's only half the function of the lens. Shift doesn't increase your dof.

Me neither, I am slowly switching to Nikon because of the superior image quality. (I am shooting low-iso only)But, with almost twenty canon lenses that is a big step for mankind, and some of the Canon lenses are better than the Nikon alternetives....

It'd be a shame if canon surprises us with a sensor better than sony/nikons. If you do plan on switching, let us know whats for sale.

O, it won't be a shame, I am really hoping for a sensor that is equal or better than the Nikon.But the 1D X was a big disappointment for me and there is no next 1ds-body in sight.Still hoping...Thats why I don't sell my Canon stuff. (at least, not yet...)

For me, photography is just a hobby, mainly, family photos. I have 2 kids(2yrs & 4yrs), the last thing I want to do is to carry 5D III + 27-70 f2.8 when go out. I want something small and easy to carry around. At the same time, I want FF quality photos. The RX1 fits well in my situation. I wish Sony comes out another version of RX1 with exchangable lenses.

Therefore, I wish not to put more $ into Canon pro gear. Again...this is just my ave Joe's everyday needs.

Me neither, I am slowly switching to Nikon because of the superior image quality. (I am shooting low-iso only)But, with almost twenty canon lenses that is a big step for mankind, and some of the Canon lenses are better than the Nikon alternetives....

It'd be a shame if canon surprises us with a sensor better than sony/nikons. If you do plan on switching, let us know whats for sale.

Sensor(DR) is not the reason for switching. I'm perfectly fine with 5D III sensor. I simply want FF sensor in P&S body(like RX1) that can switch lenses.

Why not make the 45mm ts-e faster? If you can make a 90mm ts-e f/2.8 you can make a 45mm ts-e f/2 or 1.8

The reason for the smaller aperture is the need for a design that creates the image circle necessary to adequately cover the sensor when shifted. The 90 has a natively larger image circle and thus can be a bit faster.

While it may possibly made faster there is scant practical purpose as the quality when shifted at large apertures would be poor and the cost would be very much higher.

TS lenses are almost always used on a tripod and one can still reduce the DOF be tilting the lens to get a narrow DOF at relatively small apertures. The idea that one might use it as an all-purpose lens is a bit of a stretch as MF in dim light is a pain. Macro ability might be useful though as long as infinity focus quality is not impacted.

The TS-E 90 is a superb lens but what would make it better is to allow for independent movements of the shift vs tilt such as the TS-E 17 & TS-E24 II received - this would allow Canon to add the Red ring onto the 90mm lens and if they can make it any sharper from what it already is that would be an extra bonus.

I would change my TS-E 90 to the II model simply for the independent movements and may consider the 45mm if the IQ is greatly improved.

For me, photography is just a hobby, mainly, family photos. I have 2 kids(2yrs & 4yrs), the last thing I want to do is to carry 5D III + 27-70 f2.8 when go out. I want something small and easy to carry around. At the same time, I want FF quality photos. The RX1 fits well in my situation. I wish Sony comes out another version of RX1 with exchangable lenses.

Therefore, I wish not to put more $ into Canon pro gear. Again...this is just my ave Joe's everyday needs.

Supposedly, teleconverters are compatible with the TS-E lenses, so would a 1.4x on the 24mm give you a solution?

True, I use a 1.4TC with my 17 to get 24. There are those who say the 17 lacks the sharpness of the 24 but for me it serves very well. I think TCs can be a very good tool but I think the total IQ purists are put off with the potential loss of IQ.

35 is my favorite FL but as an architectural photographer I almost never want anything longer than 24 and often need the 17.I feel Canon is trying to hedge bets with a 45. Kinda normal-ish, kinda wide-ish.0